+\begin{figure}[!ht]
+\begin{center}
+ \includegraphics[width=12cm]{sic_prec_450_energy.ps}
+\end{center}
+\caption[Total energy per atom as a function of time for the whole simulation sequence and for all three types of insertion volumes.]{Total energy per atom as a function of time for the whole simulation sequence and for all three types of insertion volumes. Arrows mark the end of carbon insertion and the start of the cooling process respectively.}
+\label{fig:md:energy_450}
+\end{figure}
+It is easily and instantly visible that there is no significant difference among the two simulations of high carbon concentration.
+The first C-C peak appears at about 0.15 nm, which is compareable to the nearest neighbour distance of graphite or diamond.
+The number of C-C bonds is much smaller for $V_1$ than for $V_2$ and $V_3$ since carbon atoms are spread over the total simulation volume.
+These carbon atoms are assumed to form strong bonds.
+This is supported by figure \ref{fig:md:energy_450} displaying the total energy of all three simulations during the whole simulation sequence.
+A huge decrease of the total energy during carbon insertion is observed for the simulations with high carbon concentration in contrast to the $V_1$ simulation, which shows a slight increase.
+The difference in energy $\Delta$ growing within the carbon insertion process persists unchanged until the end of the simulation.
+Here is the problem.
+The excess amount of next neighboured strongly bounded C-C bonds in the high concentration simulations make these configurations energetically more favorable compared to the low concentration configuration.
+However, in the same way a lot of energy is needed to break these bonds to get out of the local energy minimum advancing towards the global minimum configuration.
+Thus, this transformation is very unlikely to happen.